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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Light_bulb
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1992-09-04
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266b
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9 lines
A light bulb is an incandescent filament
lamp, first demonstrated by Joseph Swan in
the UK 1878 and Thomas Edison in the USA
1879. The present-day light bulb is a thin
glass bulb filled with an inert mixture of
nitrogen and argon gas.
Subject by: Vince Pike